| 摘要: |
| 洛带气田蓬莱镇组中上部天然气藏的储层主要为三角洲前缘的水下分流河道、河口砂坝、水下决口河道和远砂坝微相砂体。储集空间以粒间孔和粒内溶孔为主。储集岩的孔隙度一般为8%～ 16%,渗透率均值为1.970×10-3μ m2,属低中孔隙度、低渗透率储层。储渗性主要受方解石、硬石膏、长石含量和粘土矿物的影响。沉积微相控制了储层砂体的类型和展布特征。根据区内储集岩的岩石学特征、物性参数和孔喉结构特征,将其划分为四种类型。 |
| 关键词: 洛带气田 蓬莱镇组 砂岩储层 |
| DOI： |
| 附件 |
| 投稿时间：2001-08-23 |
| 基金项目: |
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| The middle and upper reservoir sandstones in the Penglaizhen Formation, Luodai gas field, western Sichuan |
| YIN Chao-yun, WANG Li |
| (Research Institute of Geology, Southwest China Bureau of Petroleum, Chengdu 610081, Sichuan, China) |
| Abstract: |
| The reservoirs of the gas pools in middle and upper parts of the Penglaizhen Formation, Luodai gas field, western Sichuan consist dominantly of four microfacies distinguished on the basis of petrography, physical parameters and pore throat structures: subaqueous distributary channel, channel-mouth bar, subaqueous crevasse channel and distal bar. The sedimentary microfacies have apparently exerted an influence on the types and distribution of reservoir sandstones. The reservoir spaces are represented by intergranular openings and intragranular solution openings. The porosity of the reservoir sandstones generally ranges between 8% and 16% and the mean values of permeability is 1.970×10-3μm, indicating a low to moderate porosity and low permeability of the reservoir sandstones. The reservoir quality and permeability depend upon the contents of calcite, anhydrite, feldspar and clay minerals. |
| Key words: Luodai gas field Penglaizhen Formation reservoir sandstone |
